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1.74ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG591310801

Shape and cutting style on the report: Round brilliant

Certificate IGI LG591310801

Diamond specifications and retailer prices

From $559 NZD
$314 USD
As of October 28, 2026
Save $1,969 NZD (78%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,528 NZD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.74ct lab-grown round diamond

This 1.74ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG591310801 or 591310801. Listed at 11 retailers as of October 28, 2026, with prices from $559 to $2,528, a $1,969 spread on the same certified stone. Brilliant Earth lists it at $2,528. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.74
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591310801
Dimensions7.68 × 7.72 × 4.81 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.68 mm7.72 mm1.74 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591310801
Side View
Table 55.0%Crown 36.3°Girdle: MediumPavilion 40.7°Culet: NoneDepth 62.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $2,528 NZD|Low: $559 NZD|High: $3,223 NZD|Avg: $1,330 NZD|+2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 4$559 NZD
Retailer 9$729 NZD
Retailer 8$771 NZD
Retailer 3$792 NZD
Retailer 6$879 NZD
Retailer 10$922 NZD
Retailer 2$1,042 NZD
Retailer 7$1,224 NZD
Retailer 12$1,764 NZD
Retailer 11$2,133 NZD
Retailer 5$2,211 NZD
Brilliant Earth$2,528 NZD

39 data points across 12 retailers

11 retailers$559 NZD to $2,528 NZD

A
Cheapest Retailer
-
$559 NZD
$314 USD
Final sale: no returns
A
Retailer 2
-
$729 NZD
HK$3,200 HKD
View
A
Retailer 3
-
$771 NZD
$433 USD
View
A
Retailer 4
-
$879 NZD
€470 EUR
View
A
Retailer 5
-
$922 NZD
$518 USD
View
A
Retailer 6
-
$1,042 NZD
£461 GBP
View
B+
Retailer 7
-
$1,224 NZD
A$1,058 AUD
View
B
Retailer 8
-
$1,764 NZD
$991 USD
View
B
Retailer 9
-
$2,133 NZD
SGD 1,619 SGD
View
B
Retailer 10
-
$2,211 NZD
£978 GBP
View
Most Expensive
B
Brilliant Earth
7790795A · Oct 29
$2,528 NZD
$1,420 USD
View
10 more retailers have this diamond
Prices start from $559 NZDSave up to $1,969 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.74ct Round
$559 NZD